28351045 has 4 divisors (see below), whose sum is σ = 34021260. Its totient is φ = 22680832.

The previous prime is 28351033. The next prime is 28351069. The reversal of 28351045 is 54015382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54015382 = 2 ⋅27007691.

It can be written as a sum of positive squares in 2 ways, for example, as 20958084 + 7392961 = 4578^2 + 2719^2 .

It is a cyclic number.

It is not a de Polignac number, because 28351045 - 2¹⁷ = 28219973 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2835100 + ... + 2835109.

It is an arithmetic number, because the mean of its divisors is an integer number (8505315).

Almost surely, 2^28351045 is an apocalyptic number.

It is an amenable number.

28351045 is a deficient number, since it is larger than the sum of its proper divisors (5670215).

28351045 is an equidigital number, since it uses as much as digits as its factorization.

28351045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5670214.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 28351045 is about 5324.5699356849. The cubic root of 28351045 is about 304.9226535035.

The spelling of 28351045 in words is "twenty-eight million, three hundred fifty-one thousand, forty-five".